Battery module positioning welding device and welding positioning method

Abstract

According to the battery module positioning welding device and the welding positioning method, one side of a battery pack conveying line is fixedly connected with a supporting column, the outer surface of the supporting column is provided with a movable arm guide groove, the upper end face of the supporting column is fixedly connected with a first lead screw motor, and the output end of the first lead screw motor is fixedly connected with a first lead screw; a main movable arm is slidably connected into the movable arm guide groove through a sliding rail, an auxiliary movable arm is slidably connected to the lower surface of the main movable arm, a second lead screw motor is fixedly connected to one end of the auxiliary movable arm, and a positive and negative tooth lead screw is fixedly connected to the output end of the second lead screw motor. The first clamping arm and the second clamping arm are controlled to be opened and closed through the positive and negative tooth lead screw, so that a clamping opening in the positioning pressing ring is connected with the two ends of the connecting piece in a clamped mode to achieve automatic picking action, the connecting piece is pressed through the positioning pressing ring during welding, the adjustable damper is compressed, pressure is kept, and the mode that the positive end and the negative end are pressed at the same time is adopted. Virtual connection caused by edge warping of the connecting piece in the welding process is avoided, and shaking and displacement are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery module welding, and particularly relates to a battery module positioning welding device and a welding positioning method. Background Art

[0002] In the production and manufacturing process of battery modules, the welding process is a crucial link, and its welding quality directly affects the performance, safety, and service life of the battery modules.

[0003] In traditional battery module welding methods, manual welding or simple fixture-assisted welding is mostly used. During manual welding, there are differences in the operation proficiency and working state of the welding workers, making it difficult to ensure that the welding positions and welding strengths are exactly the same each time, resulting in uneven welding quality. This will not only cause problems such as unstable connection and increased resistance during the use of the battery module, affecting the charge and discharge performance of the battery module, but may also lead to potential safety hazards in severe cases.

[0004] In terms of automation level, the automation level of early welding equipment was relatively low. From the feeding, positioning of the battery module and connecting piece to welding, each link requires frequent manual intervention. This not only leads to low production efficiency and cannot meet the requirements of large-scale industrial production, but also increases labor costs. In addition, the existing welding equipment has poor flexibility when dealing with battery modules of different specifications and sizes. This further prolongs the production cycle and increases the operating costs of the enterprise. Therefore, in response to the above problems, in order to improve the precise positioning during welding and avoid the problems of warping and false soldering during the welding process, the present invention proposes a battery module positioning welding device and a welding positioning method. Summary of the Invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a battery module positioning welding device and a welding positioning method. By setting a first infrared positioning component and a second infrared positioning component, the battery module and the connecting piece are accurately positioned respectively. And the first clamping arm and the second clamping arm are controlled to open and close by a positive and negative thread screw rod, so that the clamping openings on the positioning pressing ring are clamped with both ends of the connecting piece to realize an automatic picking action. During welding, the connecting piece is pressed tightly by the positioning pressing ring, and the adjustable damper is compressed and maintains pressure. By using the method of pressing both the positive and negative poles simultaneously, the connecting piece is prevented from warping and causing false connection during the welding process, reducing shaking and displacement. The welding gun is synchronously driven by two groups of telescopic ejector rods for synchronous welding, ensuring stable welding quality and reducing the occurrence probability of defects such as false soldering and missed soldering.

[0006] The present invention also provides a battery module positioning and welding device and a welding positioning method having the above, including: a battery pack conveyor line, one side of the battery pack conveyor line is fixedly connected with a support column, an active arm guide groove is provided on the outer surface of the support column, a lead screw motor one is fixedly connected to the upper end surface of the support column, a lead screw one is fixedly connected to the output end of the lead screw motor one, a main active arm is slidably connected to the inside of the active arm guide groove through a slide rail, a secondary active arm is slidably connected to the lower surface of the main active arm, a lead screw motor two is fixedly connected to one end of the secondary active arm, a positive and negative thread lead screw is fixedly connected to the output end of the lead screw motor two, a clamping arm one is slidably connected to the lower surface of the secondary active arm, a clamping arm two is slidably connected to the lower surface of the secondary active arm, the positive and negative thread lead screw is threadedly connected to the clamping arm one, and the positive and negative thread lead screw is threadedly connected to the clamping arm two;

[0007] Sliding cores are slidably connected to the inner surfaces of both the clamping arm one and the clamping arm two, adjustable dampers are provided inside both the clamping arm one and the clamping arm two, one end of the adjustable damper is connected to the sliding core, a lower extension arm is fixedly connected to the lower end surface of the sliding core, a positioning pressure ring is fixedly connected to the lower end surface of the lower extension arm, a telescopic ejector rod is fixedly connected to the inside of the sliding core, a welding gun is fixedly connected to the output end of the telescopic ejector rod, a clamping port is provided on the side surface of the positioning pressure ring, a battery module is movably connected to the upper surface of the battery pack conveyor line, a battery pack connection piece conveyor line is fixedly connected to the other side of the battery pack conveyor line, and a connection piece is movably connected to the upper surface of the battery pack connection piece conveyor line.

[0008] According to a battery module positioning and welding device provided by the present invention, a first infrared positioning component is fixedly connected to the upper surface of the battery pack conveyor line, and a second infrared positioning component is fixedly connected to the upper surface of the battery pack connection piece conveyor line near the battery pack conveyor line end.

[0009] According to a battery module positioning and welding device provided by the present invention, an installation groove is provided on the outer surface of the sliding core, a cover plate is detachably connected to the notch of the installation groove, and the telescopic ejector rod is located inside the installation groove.

[0010] According to a battery module positioning and welding device provided by the present invention, the welding gun is slidably connected to the sliding core, the inside of the positioning pressure ring is a hollow structure, and the welding gun is movably connected to the inside of the positioning pressure ring.

[0011] According to a battery module positioning and welding device provided by the present invention, a lead screw nut is provided on one side of the main active arm close to the active arm guide groove, the lead screw one is threadedly connected to the lead screw nut, and the end of the lead screw one is rotatably connected to the inner wall of the active arm guide groove.

[0012] According to a battery module positioning and welding device provided by the present invention, a third lead screw motor is fixedly connected to one end of the main movable arm away from the movable arm guide groove. The output end of the third lead screw motor is fixedly connected to a second lead screw. A lead screw nut is provided at the upper end of the auxiliary movable arm. The second lead screw is connected to the lead screw nut, and the other end of the second lead screw is rotatably connected to the main movable arm.

[0013] According to a battery module positioning and welding device provided by the present invention, the two positioning pressure rings are mirror-symmetrically distributed, and the two clamping openings are respectively clamped with the left and right ends of the connecting piece.

[0014] A battery module positioning and welding method provided by the present invention includes the following steps:

[0015] S1. After the battery pack conveyor line is started and the battery module is placed on the battery pack conveyor line, it is transmitted to the area to be welded through the battery pack conveyor line. After the nearest group of battery modules is detected by the first infrared positioning component, the battery pack conveyor line stops for the welding process.

[0016] S2. After the battery pack connecting piece conveyor line is started, the connecting pieces are conveyed so that they can be clamped one by one. After the nearest connecting piece is detected by the second infrared positioning component, the battery pack connecting piece conveyor line stops for the clamping and welding process.

[0017] S3. Height positioning: First, according to the specific height of the battery module, the height and the movement range of the main movable arm are determined. The first lead screw motor drives the first lead screw to make the main movable arm move up and down.

[0018] S4. Clamping the connecting piece: First, the third lead screw motor outputs power. The second lead screw is used to make the auxiliary movable arm move forward to the upper end of the connecting piece. The overall downward movement is controlled by the first lead screw motor. At this time, the second lead screw motor rotates clockwise, and the distance between the first clamping arm and the second clamping arm is widened to facilitate clamping the connecting piece. When the positioning pressure ring moves to the upper end of the working surface of the battery pack connecting piece conveyor line, the first lead screw motor stops, and the second lead screw motor rotates counterclockwise, driving the first clamping arm and the second clamping arm to move to reduce the distance between them, so that the clamping openings on the positioning pressure ring are respectively fixed at both ends of the connecting piece and clamp it.

[0019] S5. Positioning welding: Control the movement of the main movable arm through the first lead screw motor, and move the entire auxiliary movable arm to the upper ends of the positive and negative electrode posts of the battery module through the third lead screw motor. The second lead screw motor rotates clockwise again to release the connecting piece, and the first lead screw motor controls the main movable arm to move upward a small distance. The second lead screw motor rotates counterclockwise again to align the two positioning pressing rings with the positive and negative welding points at the left and right ends of the connecting piece respectively. The first lead screw motor controls the main movable arm to move downward a small distance, and the two positioning pressing rings respectively press on the poles of the connecting piece. The adjustable damper is compressed and the pressure is maintained. The two groups of telescopic ejector rods act simultaneously, and the welding gun head approaches the connecting piece and welds synchronously.

[0020] Compared with the prior art, in a battery module positioning welding device and a welding positioning method of the present invention, by providing a first infrared positioning component and a second infrared positioning component, precise positioning of the battery module and the connecting piece is respectively carried out. The first clamping arm and the second clamping arm are controlled to open and close through a positive and negative thread lead screw, so that the clamping openings on the positioning pressing ring are clamped with both ends of the connecting piece to realize an automatic picking-up action. During welding, the connecting piece is pressed by the positioning pressing ring, the adjustable damper is compressed and the pressure is maintained. By using the method of pressing both ends of the positive and negative electrodes simultaneously, the connecting piece is prevented from warping and causing poor contact during welding, and the shaking and displacement are reduced. The welding gun is synchronously driven by the two groups of telescopic ejector rods for synchronous welding, ensuring stable welding quality and reducing the occurrence probability of poor welding conditions such as virtual welding and missed welding. Description of the Drawings

[0021] The present invention will be further described below with reference to the drawings and embodiments;

[0022] Figure 1 It is the overall structure diagram of a battery module positioning welding device of the present invention;

[0023] Figure 2 It is the schematic diagram of the movable arm structure of a battery module positioning welding device of the present invention;

[0024] Figure 3 It is the schematic diagram of the clamping and welding part structure of a battery module positioning welding device of the present invention;

[0025] Figure 4 It is about a battery module positioning welding device of the present invention Figure 3 The enlarged view at A in;

[0026] Figure 5 It is the schematic diagram of the internal structure of the clamping and welding part of a battery module positioning welding device of the present invention.

[0027] Legend Explanation:

[0028] 1. Battery pack conveyor line; 2. Battery pack connecting piece conveyor line; 3. Support column; 4. Main movable arm; 5. Movable arm guide groove; 6. First lead screw motor; 7. First lead screw; 8. Auxiliary movable arm; 9. Second lead screw motor; 10. Third lead screw motor; 11. First infrared positioning component; 12. Second infrared positioning component; 13. Battery module; 14. Connecting piece; 15. Clamping arm one; 16. Clamping arm two; 17. Left - hand and right - hand lead screw; 18. Second lead screw; 19. Adjustable damper; 20. Slide core; 21. Lower extension arm; 22. Welding gun; 23. Cover plate; 24. Positioning press ring; 25. Clamping opening; 26. Telescopic ejector rod. Detailed implementation manners

[0029] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0030] Referring to Figures 1-5 , an embodiment of the present invention provides a battery module positioning and welding device and a welding positioning method, which includes: a battery pack conveyor line 1. A support column 3 is fixedly connected to one side of the battery pack conveyor line 1. A movable arm guide groove 5 is arranged on the outer surface of the support column 3. A first lead screw motor 6 is fixedly connected to the upper end surface of the support column 3. The output end of the first lead screw motor 6 is fixedly connected to a first lead screw 7. The main movable arm 4 is slidably connected to the inside of the movable arm guide groove 5 through a slide rail. The auxiliary movable arm 8 is slidably connected to the lower surface of the main movable arm 4. One end of the auxiliary movable arm 8 is fixedly connected to a second lead screw motor 9. The output end of the second lead screw motor 9 is fixedly connected to a left - hand and right - hand lead screw 17. The clamping arm one 15 is slidably connected to the lower surface of the auxiliary movable arm 8. The clamping arm two 16 is slidably connected to the lower surface of the auxiliary movable arm 8. The left - hand and right - hand lead screw 17 is threadedly connected to the clamping arm one 15, and the left - hand and right - hand lead screw 17 is threadedly connected to the clamping arm two 16;

[0031] On the inner surfaces of both the clamping arm one 15 and the clamping arm two 16, a sliding core 20 is slidably connected. Adjustable dampers 19 are provided inside both the clamping arm one 15 and the clamping arm two 16. One end of the adjustable damper 19 is connected to the sliding core 20. A lower extension arm 21 is fixedly connected to the lower end surface of the sliding core 20. A positioning pressure ring 24 is fixedly connected to the lower end surface of the lower extension arm 21. A telescopic ejector rod 26 is fixedly connected inside the sliding core 20. The output end of the telescopic ejector rod 26 is fixedly connected to a welding gun 22. A clamping opening 25 is provided on the side surface of the positioning pressure ring 24. A battery module 13 is movably connected to the upper surface of the battery pack conveyor line 1. On the other side of the battery pack conveyor line 1, a battery pack connection piece conveyor line 2 is fixedly connected. A connection piece 14 is movably connected to the upper surface of the battery pack connection piece conveyor line 2. A first infrared positioning component 11 is fixedly connected to the upper surface of the battery pack conveyor line 1. A second infrared positioning component 12 is fixedly connected to the upper surface of the battery pack connection piece conveyor line 2 near the end close to the battery pack conveyor line 1.

[0032] An installation groove is provided on the outer surface of the sliding core 20. A cover plate 23 is detachably connected to the notch of the installation groove. The telescopic ejector rod 26 is located inside the installation groove. The welding gun 22 is slidably connected to the sliding core 20. The inside of the positioning pressure ring 24 is a hollow structure. The welding gun 22 is movably connected to the inside of the positioning pressure ring 24. A lead screw nut is provided on one side of the main moving arm 4 close to the moving arm guide groove 5. The lead screw one 7 is threadedly connected to the lead screw nut. The end of the lead screw one 7 is rotatably connected to the inner wall of the moving arm guide groove 5. A lead screw motor three 10 is fixedly connected to the end of the main moving arm 4 away from the moving arm guide groove 5. The output end of the lead screw motor three 10 is fixedly connected to a lead screw two 18. A lead screw nut is provided at the upper end of the auxiliary moving arm 8. The lead screw two 18 is connected to the lead screw nut. The other end of the lead screw two 18 is rotatably connected to the main moving arm 4. The two positioning pressure rings 24 are mirror - symmetrically distributed. The two clamping openings 25 are respectively clamped with the left and right ends of the connection piece 14.

[0033] Working principle: The battery module positioning and welding device and the welding positioning method include the following steps:

[0034] S1. After the battery pack conveyor line 1 is started and the battery module 13 is placed on the battery pack conveyor line 1, it is transported to the area to be welded through the battery pack conveyor line 1. After the first infrared positioning component 11 monitors the nearest group of battery modules 13, the battery pack conveyor line 1 stops for the welding operation to be carried out.

[0035] S2. After the battery pack connection piece conveyor line 2 is started, the connection piece 14 is transported through it so that it can be clamped one by one. After the second infrared positioning component 12 monitors the nearest connection piece 14, the battery pack connection piece conveyor line 2 stops for the clamping and welding operation.

[0036] S3. Height positioning: First, according to the specific height of the battery module 13, determine the height and movement range of the main movable arm 4. Drive the lead screw 7 through the lead screw motor 1 6, so that the main movable arm 4 can move up and down.

[0037] S4. Clamp the connecting piece 14: First, the lead screw motor 3 10 outputs power. Use the lead screw 2 18 to move the auxiliary movable arm 8 forward to the upper end of the connecting piece 14. Control its overall downward movement through the lead screw motor 1 6. At this time, the lead screw motor 2 9 rotates clockwise, and the distance between the clamping arm 1 15 and the clamping arm 2 16 is widened to facilitate clamping of the connecting piece 14. When the positioning pressure ring 24 moves to the upper end of the working surface of the battery pack connecting piece conveyor line 2, the lead screw motor 1 6 stops, and the lead screw motor 2 9 rotates counterclockwise, driving the clamping arm 1 15 and the clamping arm 2 16 to move to narrow the distance between them, so that the clamping ports 25 on the positioning pressure ring 24 are respectively fixed at both ends of the connecting piece 14 and clamp it.

[0038] S5. Positioning welding: Control the movement of the main movable arm 4 through the lead screw motor 1 6, and move the auxiliary movable arm 8 as a whole to the upper ends of the positive and negative electrode posts of the battery module 13 through the lead screw motor 3 10. The lead screw motor 2 9 rotates clockwise again to release the connecting piece 14, and the lead screw motor 1 6 controls the main movable arm 4 to move upward a small distance. The lead screw motor 2 9 rotates counterclockwise again to align the two positioning pressure rings 24 with the positive and negative welding points at the left and right ends of the connecting piece 14 respectively. The lead screw motor 1 6 controls the main movable arm 4 to move downward a small distance, and the two positioning pressure rings 24 respectively press on the poles of the connecting piece 14, and the adjustable damper 19 is compressed and the pressure is maintained. The two sets of telescopic ejector rods 26 act simultaneously, and the head of the welding gun 22 approaches the connecting piece 14 and acts simultaneously to achieve synchronous welding.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and do not limit the technical solutions. Although the applicant has described the present invention in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention cannot depart from the purpose and scope of the present technical solution, and should be covered within the scope of the claims of the present invention.

Claims

1. A battery module positioning and welding device, characterized in that, Including: A battery pack conveyor line (1), on one side of the battery pack conveyor line (1), a support column (3) is fixedly connected. An active arm guide groove (5) is provided on the outer surface of the support column (3). A lead screw motor one (6) is fixedly connected to the upper end surface of the support column (3). The output end of the lead screw motor one (6) is fixedly connected to a lead screw one (7). A main active arm (4) is slidably connected inside the active arm guide groove (5) through a slide rail. A secondary active arm (8) is slidably connected to the lower surface of the main active arm (4). One end of the secondary active arm (8) is fixedly connected to a lead screw motor two (9). The output end of the lead screw motor two (9) is fixedly connected to a left - hand and right - hand lead screw (17). A clamping arm one (15) is slidably connected to the lower surface of the secondary active arm (8). A clamping arm two (16) is slidably connected to the lower surface of the secondary active arm (8). The left - hand and right - hand lead screw (17) is threadedly connected to the clamping arm one (15). The left - hand and right - hand lead screw (17) is threadedly connected to the clamping arm two (16); Sliding cores (20) are slidably connected to the inner surfaces of both the clamping arm one (15) and the clamping arm two (16). Adjustable dampers (19) are provided inside both the clamping arm one (15) and the clamping arm two (16). One end of the adjustable damper (19) is connected to the sliding core (20). A lower extension arm (21) is fixedly connected to the lower end surface of the sliding core (20). A positioning pressure ring (24) is fixedly connected to the lower end surface of the lower extension arm (21). A telescopic ejector rod (26) is fixedly connected inside the sliding core (20). The output end of the telescopic ejector rod (26) is fixedly connected to a welding gun (22). A clamping port (25) is provided on the side surface of the positioning pressure ring (24). A battery module (13) is movably connected to the upper surface of the battery pack conveyor line (1). A battery pack connection piece conveyor line (2) is fixedly connected to the other side of the battery pack conveyor line (1). A connection piece (14) is movably connected to the upper surface of the battery pack connection piece conveyor line (2).

2. The positioning and welding device for a battery module according to claim 1, wherein A first infrared positioning component (11) is fixedly connected to the upper surface of the battery pack conveyor line (1). A second infrared positioning component (12) is fixedly connected to the upper surface of the battery pack connection piece conveyor line (2) near the end close to the battery pack conveyor line (1).

3. The positioning and welding device for a battery module according to claim 1, characterized in that, An installation groove is provided on the outer surface of the sliding core (20). A cover plate (23) is detachably connected to the notch of the installation groove. The telescopic ejector rod (26) is located inside the installation groove.

4. A battery module positioning and welding device according to claim 1, characterized in that, The welding gun (22) is slidably connected to the sliding core (20). The inside of the positioning pressure ring (24) is of a hollow structure. The welding gun (22) is movably connected to the inside of the positioning pressure ring (24).

5. The positioning and welding device for a battery module according to claim 1, characterized in that, A lead screw nut is provided on one side of the main active arm (4) close to the active arm guide groove (5). The lead screw one (7) is threadedly connected to the lead screw nut. The end of the lead screw one (7) is rotatably connected to the inner wall of the active arm guide groove (5).

6. The positioning and welding device for a battery module according to claim 1, characterized in that, One end of the main movable arm (4) away from the movable arm guide groove (5) is fixedly connected with a third lead screw motor (10). The output end of the third lead screw motor (10) is fixedly connected with a second lead screw (18). The upper end of the auxiliary movable arm (8) is provided with a lead screw nut. The second lead screw (18) is connected with the lead screw nut. The other end of the second lead screw (18) is rotatably connected with the main movable arm (4).

7. A battery module positioning and welding device according to claim 1, characterized in that The two positioning clamping rings (24) are mirror-symmetrically distributed. The two clamping openings (25) are respectively clamped with the left and right ends of the connecting piece (14).

8. A positioning welding method for a battery module, which uses a battery module positioning welding device according to any one of claims 1-7, characterized in that, It includes the following steps: S1. After the battery pack conveyor line (1) is started and the battery module (13) is placed on the battery pack conveyor line (1), it is transmitted to the welding area through the battery pack conveyor line (1). After the first infrared positioning component (11) monitors the nearest battery module (13), the battery pack conveyor line (1) stops for the welding process; S2. After the battery pack connecting piece conveyor line (2) is started, the connecting piece (14) is conveyed through it so that it can be clamped one by one. After the second infrared positioning component (12) monitors the nearest connecting piece (14), the battery pack connecting piece conveyor line (2) stops for the clamping and welding process; S3. Height positioning. First, according to the specific height of the battery module (13), the height and movement range of the main movable arm (4) are determined. The first lead screw motor (6) drives the first lead screw (7) to make the main movable arm (4) move up and down; S4. Clamp the connecting piece (14). First, the third lead screw motor (10) outputs power. The second lead screw (18) is used to make the auxiliary movable arm (8) move forward to the directly upper end of the connecting piece (14). The first lead screw motor (6) controls its overall downward movement. At this time, the second lead screw motor (9) rotates clockwise, and the distance between the first clamping arm (15) and the second clamping arm (16) is widened to facilitate clamping of the connecting piece (14). When the positioning clamping ring (24) moves to the upper end of the working surface of the battery pack connecting piece conveyor line (2), the first lead screw motor (6) stops, and the second lead screw motor (9) rotates counterclockwise, driving the first clamping arm (15) and the second clamping arm (16) to move to reduce their distance, so that the clamping openings (25) on the positioning clamping ring (24) are respectively fixed at both ends of the connecting piece (14) and clamp it; S5. Positioning welding: Control the movement of the main movable arm (4) through the first lead screw motor (6), and move the auxiliary movable arm (8) as a whole to the upper ends of the positive and negative electrode posts of the battery module (13) through the third lead screw motor (10). The second lead screw motor (9) rotates clockwise again to release the connecting piece (14), and the first lead screw motor (6) controls the main movable arm (4) to move upward a small distance. The second lead screw motor (9) rotates counterclockwise again to align the two positioning pressure rings (24) with the positive and negative welding points at the left and right ends of the connecting piece (14) respectively. The first lead screw motor (6) controls the main movable arm (4) to move downward a small distance, and the two positioning pressure rings (24) press the poles of the connecting piece (14) respectively. The adjustable damper (19) is compressed and the pressure is maintained. The two groups of telescopic ejector rods (26) act simultaneously, and the head of the welding gun (22) approaches the connecting piece (14) and performs synchronous welding.

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